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Modern aeroplanes have winglets on their wings to reduce aerodynamic drag caused by wingtip vortices.

 

Maybe a similar principle applies to the primary flight feathers of large birds ….

 

Species: Great Cormorant / Phalacrocorax carbo / 普通鸕鶿

 

Thank you for your interest, views, faves, comments and awards ! This image was captured in Hong Kong 香港. (Better viewed on a larger screen.)

 

© This Image is under full copyright Rick C. Graham. © All rights reserved Rick C. Graham. © This image is subject to international copyright laws and may not be copied, downloaded, reproduced, transferred or manipulated without the express written permission of Rick C. Graham.

Just because I like this shot of a wingtip on a plane at the Palo Alto airport. Back when you could get close enough to get shots like this.

A pleasant surprise on the approach to GJT

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